NPCs (Portal Reloaded)

Master Test Chambers 13, 14, and 15 in Portal Reloaded by strategically using lasers, time portals, and reflector cubes to solve complex puzzles and advance through the game.

This section of the Portal Reloaded guide focuses on solving Test Chambers 13, 14, and 15, which heavily involve the use of lasers and time manipulation.

Test Chamber 13: Start by placing portals as shown in the image. Use a portal to redirect the laser sideways and a time portal to move it into the future. You may take some damage from the laser to travel into the future. Once in the future, rearrange portals without affecting the present setup. Position portals so the laser directly hits the target, then proceed through the exit door.

Test Chamber 14: First, travel to the present using a time portal. Summon a reflector cube from the central switch and position it as indicated. Use a portal to direct a laser through the first node, then use this laser to reflect into the next two nodes. Travel to the future. Use portals to bring a laser into the present through the time portal, ensuring it passes through the designated node. Retrieve the reflector cube from the future and bring it to the present. Ensure the present reflector cube hits all three nodes; adjust its position if necessary. Return to the future to retrieve the future reflector cube if you moved it. Finally, place the future reflector cube at the end of the nodes in the future so it reflects the laser into the receiver, completing the chamber.

Test Chamber 15: This chamber requires frequent time travel. Begin by passing through the particle field to the left. Place a portal where the laser hits the wall and a time portal on the opposite wall. Travel through the time portal to reach the future, bypassing the particle field. Proceed to the other side of the room and use another time portal to return to the present, now on the other side of the field. Place a new portal on the upper wall above the laser room so the laser hits the first receiver. Travel back to the future and place a portal on the small wall in the laser room to aim at the receiver. Return to the present; the laser should still be hitting the first receiver, powering an elevating platform. Stand on this platform and place a time portal behind the node to raise the platform further, allowing you to summon a reflector cube. Place this cube on the lip above the second receiver. Travel to the future and retrieve the future reflector cube. Run into the laser room and place another time portal to bring the future reflector cube into the present laser room. Position it to reflect the laser into the second receiver through the node. To reach the other side of the particle field without passing through it, use a portal on the other side or a time portal. You need to be in the present on the other side. Climb the stairs and use a portal on the upper wall to hit the third receiver. Finally, move the reflector cube onto the switch to complete the test chamber.